You do not need a 501c3 to be a church. Each State recognizes the for-profit and non-profit corporations when you file with them. The IRS has already codified churches in the tax code as nonprofits so there is no Fedral impacts. The 501c3 only allows churches to book-keep the money and assets given to churches and assign the value to the giver at the end of the year. Our church has existed for over a hundred years without a 501c3 the entire time - it is up to the individual donor to track their own donations for their returns, not the church. Every church that has one has voluntarily “muzzled” themselves for no reason at all ever since Johnson changed the law about what churches can talk about.
Once the next democrat gets in, i state, not opine, that every church not known to the irs, will be deemed illegitimate religious organizations.